Both Blue Oak and Apache are relatively modern permissive licenses, but they differ intentionally in design. In the short to medium term, I foresee that many projects will continue to choose Apache where contributions from large software patent holders are essential, because of Apache's complex rules on patent scope. At the same time, I think large software patent holders will prefer to receive code under the uncomplicated Blue Oak patent grant, even as they insist on Apache's mazelike compromise for outbound contributions.